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atomic structure and ions

Total questions: 40

Worksheet time: 24mins

Name
Class
Date
1.

The negatively charged subatomic particles that are located in energy levels around the nucleus

a)

Protons

b)

Neutrons

c)

Electrons

d)

Ions

2.

Positively charged subatomic particles located in the nucleus of an atom

a)

protons

b)

neutrons

c)

electrons

d)

ions

3.

The neutral subatomic particles located in the nucleus of an atom

a)

protons

b)

neutrons

c)

electrons

d)

ions

4.

The outer most electrons of an atom

a)

valance electrons

b)

diatomic molecules

c)

bohr models

d)

isotopes

5.

Loss or gaining of an electron changes and atom into __________.

a)

isotopes

b)

valance electrons

c)

bohr models

d)

ions

6.

Is a substance made up of only one kind of atom.

a)

pure substance

b)

element

c)

compound

d)

mixture

7.

Is the number of protons in an element

a)

atomic mass

b)

atomic number

c)

valance protons

d)

diatomic molecules

8.

Is the protons plus the neutrons

a)

valance electrons

b)

atomic number

c)

atomic mass

d)

bohr diagram

9.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
10.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
11.

Why are ions formed?

a)

To make our lives difficult

b)

Because atoms want to be stable

c)

Because atoms have the same number of protons and electrons

d)

Because atoms gained neutrons

12.

Cations are...

a)

Positive

b)

Negative

c)

Neutral

13.

Anions are...

a)

Positive

b)

Negative

c)

Neutral

14.

Think fast! An element has 25 protons and 22 electrons. It has a charge of...

a)

3+

b)

3-

c)

2+

d)

1-

15.
How many neutrons does B (Boron) contain?
a)
5
b)
11
c)
6
d)
10.811
16.

How are electrons similar to neutrons?

a)

Both have negative charge

b)

Both are part of a molecule

c)

Both make up parts of an atom

d)

Both are in nucleus

17.

The number of electrons in an atom is equal to ......

a)

the number of protons

b)

the number of neutrons

c)

the atomic mass

18.
These subatomic particles are taken or removed to form ions. 
a)
neutrons 
b)
protons 
c)
electrons 
d)
nimrons 
19.
How many electrons does an oxide ion contain?
a)
2
b)
6
c)
8
d)
10
20.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
21.

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

a)

18 protons

b)

40 protons

c)

22 protons

d)

21.9 protons

22.
The mass of this particle is so small that it is not counted.
a)
proton
b)
electron
c)
neutron
d)
quark
23.
True or False - Protons and Neutrons have about the same mass.
a)
True - They have about the same mass
b)
False - They do not have about the same mass
24.

For a neutral atom, which 2 subatomic particles must be equal in number?

a)

protons and neutrons

b)

protons and electrons

c)

electrons and neutrons

d)

electrons and ions

25.

How many electrons can the lowest energy level hold?

a)

2

b)

4

c)

6

d)

8

26.

An electron on an atom's OUTERMOST energy level is called a _____ electron.

a)

constant

b)

stable

c)

outer

d)

valence

27.

How many valence electrons does this atom have?

a)

2

b)

5

c)

8

d)

15

28.

How many valence electrons would an atom of lithium have?

(Lithium has 3 protons.)

a)

1

b)

2

c)

3

d)

5

29.

O ionizes to a charge of ________.

a)

+1

b)

+2

c)

-1

d)

-2

30.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
31.
What is the charge of an atom that has gained one electron?
a)
-1
b)
-2
c)
+1
d)
+2
32.
If an element has 3 valence electrons, what charge will likely form on its ion ?  Hint:  It will lose those electrons.  What happens to the charge when it loses 3 electrons?
a)
+3
b)
+5
c)
-3
d)
-5
33.
What charge will a Beryllium ion have?
a)
+
b)
2+
c)
2-
d)
-
34.
What charge will a sulfide ion have?
a)
3+
b)
2+
c)
2-
d)
3-
35.
What charge will a nitride ion have?
a)
3+
b)
2+
c)
2-
d)
3-
36.
what charge will an aluminum ion have?
a)
3+
b)
2+
c)
2-
d)
3-
37.
How many valence electrons does magnesium have?
a)
1
b)
2
c)
12
d)
24
38.
How many valence electrons does Carbon have?
a)
4
b)
12
c)
6
d)
14
39.
If an atom has 3 valence electrons, what charge will it have as an ion?
a)
+3
b)
-3
c)
+5
d)
-5
40.
Why are ions charged particles?
a)
The number of electrons does not equal the number of protons.
b)
The number of protons does not equal the number of neutrons.
c)
The number of neutrons does not equal the number of electrons.
d)
The electric charges of the electrons and protons cancel each other out.

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